With our personalized recommendation through 1-on-1 conversation, we help you understand customer’s preferences. Designed as a chatty Artificial Intelligent who put emotional aspect into her chat, Rinna makes her friends feel as if they chatted with a human being. The emotional engagement is the key. With a friendly conversation, she offers various products based on the customer’s interests. This is done in “quiz-style”; with interesting contents embedded. Using the reinforcement learning method, we create a dynamic tree of questions automatically without prior knowledge of target customers.